US6540060B1 - Belt drive assembly for a passenger conveyor - Google Patents

Belt drive assembly for a passenger conveyor Download PDF

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Publication number
US6540060B1
US6540060B1 US10/021,280 US2128001A US6540060B1 US 6540060 B1 US6540060 B1 US 6540060B1 US 2128001 A US2128001 A US 2128001A US 6540060 B1 US6540060 B1 US 6540060B1
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US
United States
Prior art keywords
belt
support
drive
rollers
loop
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US10/021,280
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English (en)
Inventor
Richard Fargo
John P. Wesson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Otis Elevator Co
Original Assignee
Otis Elevator Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Otis Elevator Co filed Critical Otis Elevator Co
Assigned to OTIS ELEVATOR COMPANY reassignment OTIS ELEVATOR COMPANY ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: FARGO, RICHARD, WESSON, JOHN P.
Priority to US10/021,280 priority Critical patent/US6540060B1/en
Priority to PCT/US2002/034762 priority patent/WO2003037774A1/en
Priority to JP2003540067A priority patent/JP4391233B2/ja
Priority to EP02782252.7A priority patent/EP1440031B1/en
Priority to AU2002348329A priority patent/AU2002348329B2/en
Priority to TW091132164A priority patent/TWI286530B/zh
Priority to KR1020047005639A priority patent/KR100947167B1/ko
Priority to CNB028217284A priority patent/CN100384711C/zh
Priority to BRPI0213394-6A priority patent/BR0213394B1/pt
Publication of US6540060B1 publication Critical patent/US6540060B1/en
Application granted granted Critical
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B23/00—Component parts of escalators or moving walkways
    • B66B23/02—Driving gear
    • B66B23/028—Driving gear with separate drive chain or belt that engages directly the carrying surface chain
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B23/00—Component parts of escalators or moving walkways
    • B66B23/02—Driving gear
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/02—Gearings for conveying rotary motion by endless flexible members with belts; with V-belts
    • F16H7/023—Gearings for conveying rotary motion by endless flexible members with belts; with V-belts with belts having a toothed contact surface or regularly spaced bosses or hollows for slipless or nearly slipless meshing with complementary profiled contact surface of a pulley

Definitions

  • This invention generally relates to passenger conveyor drive systems. More particularly, this invention relates to a drive belt assembly for a passenger conveyor.
  • Passenger conveyors such as escalators or moving walkways typically include a plurality of steps or pallets that move in a loop pattern.
  • a drive assembly for moving the steps typically is supported within a building structure underneath the corresponding floor also enclosed so that it is hidden from view.
  • This invention provides a unique belt drive arrangement that has a support assembly for ensuring satisfactory performance of the overall drive system.
  • this invention is an assembly for driving a passenger conveyor system.
  • a drive assembly designed according to this invention includes a drive belt that has a cogged surface that is adapted to engage correspondingly configured links of a step chain associated with a plurality of steps.
  • the drive belt forms a loop.
  • a drive sheave is positioned at one end of the loop and engages an inner surface of the drive belt to move the belt around the loop.
  • An idle sheave is positioned at an opposite end of the loop and engages the inner surface of the drive belt. The idle sheave moves with the belt responsive to movement of the drive sheave.
  • a belt support is positioned between the drive sheave and the idle sheave.
  • the belt support has at least one moveable element engaging the inner surface of the belt and maintaining a desired position of the belt near the belt support to insure a desired engagement between the cogged surface of the drive belt and the links of the step chain near the belt support.
  • FIG. 1 diagrammatically illustrates an escalator system.
  • FIG. 2 schematically illustrates selected portions of a preferred embodiment of a drive assembly designed according to this invention.
  • FIG. 3 illustrates selected portions of another example drive assembly designed according to this invention.
  • FIG. 4 illustrates selected portions of another example drive assembly designed according to this invention.
  • FIGS. 5A and 5B illustrate selected portions of a belt support arrangement of another example drive assembly designed according to this invention.
  • FIGS. 6A and 6B illustrate a modified version of the example embodiment of FIGS. 5A and 5B.
  • FIG. 7 illustrates selected portions of another modification of the embodiment of FIGS. 5A and 5B.
  • FIG. 8 schematically illustrates another example assembly designed according to an embodiment of this invention.
  • a passenger conveyor system 20 includes a drive assembly 22 for moving a plurality of steps 24 in a desired direction.
  • a handrail 26 moves with the steps 24 in a conventional manner.
  • An escalator is illustrated in FIG. 1 as an example passenger conveyor. This invention is equally applicable to moving walkways or other passenger conveyors.
  • a drive assembly 22 designed according to this invention includes a drive belt 30 .
  • a drive sheave 32 preferably engages an inner side of the drive belt 30 to move the belt 30 around a loop.
  • An idle sheave 34 preferably is positioned at an opposite end of the loop from the drive sheave 32 .
  • a drive mechanism 36 is schematically shown for moving the drive sheave 32 in the desired direction and at the desired speed.
  • the drive mechanism 36 may include a braking mechanism as known in the art, for example.
  • the belt 30 preferably includes reinforcing members such as steel cords or polymer strands encased in a polymer material.
  • An outer surface 40 on the drive belt 30 preferably is cogged while an inner surface 42 preferably is also cogged.
  • the inner surface is shaped to interface with the drive sheave 32 .
  • the cogged surfaces are also referred to as having teeth in this description.
  • the outer surface 40 preferably cooperates with a plurality of step chain links 44 , which are associated with the steps 24 in a known manner.
  • the cogged pattern on the outer surface 40 preferably corresponds to the pattern of teeth on the step chain links 44 .
  • a belt support 50 preferably is positioned between the drive sheave 32 and the idle sheave 34 .
  • the belt support 50 avoids any sagging of the belt in a central portion of the loop where the drive belt 30 may otherwise become disengaged from the step chain links 44 .
  • the belt support 50 includes a plurality of rollers 52 that engage the inner surface 42 on the belt 30 .
  • Each of the rollers 52 preferably includes an outer surface having a plurality of spaced spines 54 and grooves 56 .
  • the configuration of the outer surface on the rollers 52 preferably complements the configuration of the inner surface 42 on the belt 30 , which permits the rollers 52 to support the belt 30 between the teeth.
  • the rollers 52 preferably extend axially across the width of the belt 30 and freely rotate about their respective axes 58 .
  • the belt support 50 preferably is supported on an escalator truss structure. It is also possible to arrange the belt support 50 to be supported by the building structure, which may be particularly useful for moving walkways. In one example the rollers 52 are supported on fixed axles that extend between parallel plates, which are securely positioned to maintain desired roller positions. Given this description, those skilled in the art will be able to realize appropriate support structures for maintaining the belt support 50 in a preferred location so that it operates as needed for a particular situation.
  • the rollers 52 preferably are positioned to cause the belt 30 to have a desired amount of engagement with the step chain links 44 in the vicinity of the support 50 .
  • the rollers preferably are as small as practical given the belt tooth pitch.
  • the space between the sheaves and between the top and bottom of the belt loop impacts how many rollers will provide the desired support. Given this description, those skilled in the art will be able to determine the proper number of rollers needed and their optimum placement to meet the needs of a particular situation.
  • the rollers 52 preferably are positioned to insure proper engagement between the belt 30 and the step chain links 44 without interfering with such engagement or introducing undesirable wear or temperature increases on the belt 30 .
  • a belt support 50 designed according to this invention preferably distributes the load across the teeth on the cogged surface 40 of the belt as evenly as possible over a plurality of the teeth. In one example, the load is distributed across approximately twelve teeth.
  • a belt support 50 designed according to this invention also eliminates the need for any special tooth configurations that otherwise might be necessary to avoid clash at the engagement between the teeth on the belt and the corresponding surfaces on the step chain links. With a belt support designed according to this invention, the teeth on the belt 30 may include nearly vertical faces, which requires minimal engagement force and renders the overall drive system more efficient.
  • a belt support designed according to this invention therefore provides for a more evenly distributed load over the belt surface along the entire loop, which improves the belt life and the performance of the drive system.
  • FIG. 3 illustrates another example belt support 50 A.
  • This example includes a support chain 60 that engages the inner surface 42 on the drive belt 30 .
  • the links of the chain 60 have associated rollers 61 that follow tracks 62 and 64 .
  • the rollers 61 follow a loop that is smaller than the loop of the drive belt 30 .
  • the support chain 60 ensures that the drive belt 30 is in a position to properly engage the step chain links 44 .
  • the support chain 60 includes a generally flat surface that is received against the inner surface 42 on the drive belt 30 .
  • the support chain includes a cogged surface that corresponds to and engages the cogged inner surface 42 of the belt so that the chain moves about its own loop as the drive belt 30 moves above its loop.
  • FIG. 4 shows another example belt support 50 B. Only portions of selected components are shown diagrammatically for simplicity.
  • a support chain 70 follows a loop that is smaller than the loop of the drive belt 30 .
  • the support chain 70 is held in a desired position by rollers 72 and 74 .
  • the rollers preferably are positioned to force the chain 70 into contact with the drive belt 30 along a portion of the length of the loop of the chain 70 as desired.
  • the support chain 70 preferably is designed to pivot in one direction but not in an opposite direction.
  • Each link 76 preferably is constructed so that an adjacent link pivots about an axis 78 in only one direction preferably up to an angle of approximately 90 degrees. This is schematically illustrated by the direction arrow 79 , which shows the permissible movement between adjacent links. The structure of each link prevents any pivoting in an opposite direction.
  • the chain preferably is designed so that any deflection of the chain in the direction opposite to the pivot direction corresponds to an arc having an eight meter radius.
  • Such an arrangement accommodates the physical limitations on designing a chain to prevent pivoting in one direction while maintaining the desired amount of contact between the drive belt 30 and the step chain links 44 along a given portion of the drive belt loop.
  • the support chain provides the advantage of distributing the load for urging the drive belt into engagement with the step chain links over a chosen length of the belt rather than causing point contact.
  • the loop of the support chain preferably is arranged so that the chain does not cause engagement between the belt and step chain links at the locations where the support chain turns about a radius of the support rollers or pulleys. This eliminates clash issues between the belt 30 and teeth on the links 44 . Additionally, these arrangements allow the belt deflection angle to be limited to approximately one degree. This limits the force on the engagement system, produced by the belt tension, to around 300 N, even when the tension on the belt is approximately 10,000 N.
  • the tracks or rollers that guide the support chain preferably are designed to allow for some oscillatory motion at the turning points to allow for the polygon effect of the support chain links when moving around a loop.
  • FIGS. 5A and 5B illustrate another example belt support 50 C designed according to this invention.
  • a plurality of rollers 80 are spaced about the undersurface 42 of the belt 30 .
  • the rollers 80 are supported on a plurality of axes 81 that are appropriately supported by an escalator truss structure.
  • the belt 30 preferably is machined so that the undersurface 42 includes a plurality of flat portions 82 along which the rollers 80 contact the belt 30 .
  • a plurality of rollers 80 preferably are spaced apart axially and in a transverse direction so that the rollers 80 are staggered to more evenly distribute the load across the surface of the belt in the area of the support 50 C.
  • Those skilled in the art who have the benefit of this description will be able to chose the number of rollers used and the spacing needed to meet the needs of their particular situation.
  • FIGS. 6A and 6B illustrate a modification to the embodiment of FIGS. 5A and 5B.
  • a belt support 50 D includes a plurality of sets of rollers 90 that are spaced laterally in similar fashion to the rollers 80 of the previous example.
  • a plurality of support belts 92 are received about the sets of rollers 90 .
  • Each support belt 92 is received about a row of rollers 90 as seen in the direction of belt travel.
  • the support belts 92 may be made from a polymer material.
  • the support belts 92 preferably engage flat portions 94 that are machined on the inner side 42 of the belt 30 . In this example, the support belts 92 better distribute the load on the belt 30 compared to rollers that directly contact the drive belt 30 .
  • FIG. 7 includes a belt support 50 E that includes support belts 92 that travel along a loop that is approximately the same size of the loop of the drive belt 30 .
  • a plurality of support belts 92 engage a plurality of flat portions machined on the inner side of the belt 42 like that shown for the previous example.
  • the support belts 92 preferably travel about the drive sheave 32 and the idle sheave 34 .
  • the surfaces of the sheaves preferably are machined to accommodate the support belts 92 along with the drive belt 30 .
  • the sheave surfaces are machined to include flats corresponding to the positions of the support belts 92 .
  • the support belts 92 are supported by rollers 90 to maintain a desired amount of contact between the support belts 92 and the drive belt 30 along the entire loop.
  • FIG. 8 illustrates a belt support 50 F having a plurality of rollers 100 .
  • a support belt 102 travels about a loop around the rollers 100 and engages the inner surface 42 of the drive belt 30 .
  • the rollers 100 and support belts 102 preferably are arranged like the alignment shown in FIGS. 6A and 6B (with the exception of flats on the belt 30 ).

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Escalators And Moving Walkways (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
US10/021,280 2001-10-30 2001-10-30 Belt drive assembly for a passenger conveyor Expired - Lifetime US6540060B1 (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
US10/021,280 US6540060B1 (en) 2001-10-30 2001-10-30 Belt drive assembly for a passenger conveyor
AU2002348329A AU2002348329B2 (en) 2001-10-30 2002-10-30 Belt drive assembly for a passenger conveyor
JP2003540067A JP4391233B2 (ja) 2001-10-30 2002-10-30 乗客コンベア用のベルト駆動アセンブリ
EP02782252.7A EP1440031B1 (en) 2001-10-30 2002-10-30 Belt drive assembly for a passenger conveyor
PCT/US2002/034762 WO2003037774A1 (en) 2001-10-30 2002-10-30 Belt drive assembly for a passenger conveyor
TW091132164A TWI286530B (en) 2001-10-30 2002-10-30 Belt drive assembly for a passenger conveyor
KR1020047005639A KR100947167B1 (ko) 2001-10-30 2002-10-30 승객 컨베이어용 벨트 구동 조립체
CNB028217284A CN100384711C (zh) 2001-10-30 2002-10-30 用于乘客输送机的输送带驱动装置
BRPI0213394-6A BR0213394B1 (pt) 2001-10-30 2002-10-30 conjunto para acionar um sistema de transportador de passageiros.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US10/021,280 US6540060B1 (en) 2001-10-30 2001-10-30 Belt drive assembly for a passenger conveyor

Publications (1)

Publication Number Publication Date
US6540060B1 true US6540060B1 (en) 2003-04-01

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US10/021,280 Expired - Lifetime US6540060B1 (en) 2001-10-30 2001-10-30 Belt drive assembly for a passenger conveyor

Country Status (9)

Country Link
US (1) US6540060B1 (pt)
EP (1) EP1440031B1 (pt)
JP (1) JP4391233B2 (pt)
KR (1) KR100947167B1 (pt)
CN (1) CN100384711C (pt)
AU (1) AU2002348329B2 (pt)
BR (1) BR0213394B1 (pt)
TW (1) TWI286530B (pt)
WO (1) WO2003037774A1 (pt)

Cited By (26)

* Cited by examiner, † Cited by third party
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WO2004063077A1 (en) * 2003-01-07 2004-07-29 Otis Elevator Company Drive belt for a passenger conveyor
WO2004071927A1 (en) * 2003-02-06 2004-08-26 Otis Elevator Company Belt drive assembly for a passenger conveyor
US20040168891A1 (en) * 2001-08-04 2004-09-02 Kone Corporation Method for guiding a link plate chain in an area of a reversing device of a pedestrian conveyor system
US20050016817A1 (en) * 2001-04-27 2005-01-27 Kone Corporation Method and device for reducing the polygon effect in the reversing area of pedestrain conveyor system
US20050279611A1 (en) * 2003-02-27 2005-12-22 Kone Corporation Actuating device for a moving sidewalk
US20060011450A1 (en) * 2003-01-07 2006-01-19 Fargo Richard N Drive belt for a passenger conveyor
US20080190733A1 (en) * 2005-05-05 2008-08-14 Changsheng Guo Passenger Conveyor Handrail With Sliding Material on Toothed Driven Surface
WO2009011698A1 (en) * 2007-07-18 2009-01-22 Otis Elevator Company Drive belt configuration for passenger conveyors
US20090120762A1 (en) * 2007-11-12 2009-05-14 Thyssenkrupp Elevator Innovation Center, S.A. Drive system for moving walkways and stairs
US20090139830A1 (en) * 2007-12-03 2009-06-04 Thyssenkrupp Elevator (Es/Pbb) Ltd. Conveyor system for the transport of passengers/goods
US20090308712A1 (en) * 2006-08-02 2009-12-17 Ketten Wulf Betriebs-Gmbh Escalator
WO2010019150A1 (en) 2008-08-15 2010-02-18 Otis Elevator Company Tension member and polymer jacket assembly including a geometry stabilizer in the jacket
WO2010019149A1 (en) 2008-08-15 2010-02-18 Otis Elevator Company Cord and polymer jacket assembly having a friction stabilizer in the polymer jacket material
US20110108387A1 (en) * 2008-08-15 2011-05-12 Xiaomei Yu Cord and polymer jacket assembly having an adhesion enhancer in the polymer jacket material
WO2013052032A1 (en) * 2011-10-03 2013-04-11 Otis Elevator Company Drive assembly for a passenger conveyor
EP2672003A2 (en) 2008-08-15 2013-12-11 Otis Elevator Company Elevator load bearing member with a polymer jacket having a flame retardant in the polymer jacket material
US20160039641A1 (en) * 2013-04-08 2016-02-11 Otis Elevator Company Chain drive system with polygon compensation
US20190218069A1 (en) * 2018-01-15 2019-07-18 Otis Elevator Company Moving walkway
IT201800007647A1 (it) * 2018-07-31 2020-01-31 Marchesini Group Spa Sistema di trasporto
US10577223B2 (en) 2018-01-10 2020-03-03 Otis Elevator Company Moving walkway
US10793364B1 (en) * 2019-08-09 2020-10-06 Skarlupka Mfg., Inc. Universal sorter transfer module
US10968080B2 (en) 2017-10-19 2021-04-06 Otis Elevator Company Drive belt for people conveyors
US11052956B2 (en) 2018-09-26 2021-07-06 Toyota Research Institute, Inc. Tracked robots having track with roller wheels
US11174108B1 (en) 2019-08-09 2021-11-16 Skarlupka Mfg., Inc. Universal sorter transfer module
US11230459B2 (en) * 2020-06-26 2022-01-25 Otis Elevator Company Belt-driven escalator
US11286135B2 (en) * 2019-11-08 2022-03-29 Otis Elevator Company Belt-driven escalator

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CN103171961B (zh) * 2013-03-21 2015-02-11 东南电梯股份有限公司 一种斜巷人员长距离运输系统
CN106429769B (zh) * 2016-12-16 2018-02-13 浙江威特电梯有限公司 回旋观光扶梯
EP3747821A1 (en) 2019-06-04 2020-12-09 Otis Elevator Company Belt-driven people conveyors
CN110759215A (zh) * 2019-11-08 2020-02-07 四川大学 一种适用于井下架空乘人装置的自动人行道
EP3929138A1 (en) * 2020-06-26 2021-12-29 Otis Elevator Company Belt-driven escalator

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EP1440031A1 (en) 2004-07-28
TW200302201A (en) 2003-08-01
JP4391233B2 (ja) 2009-12-24
BR0213394B1 (pt) 2011-02-08
KR100947167B1 (ko) 2010-03-12
CN1578752A (zh) 2005-02-09
CN100384711C (zh) 2008-04-30
AU2002348329B2 (en) 2007-09-13
KR20040045851A (ko) 2004-06-02
BR0213394A (pt) 2005-01-11
EP1440031B1 (en) 2013-09-25
JP2005507839A (ja) 2005-03-24
WO2003037774A1 (en) 2003-05-08
TWI286530B (en) 2007-09-11

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